#100A09#100A09

#100A09 is a very dark, near-neutral red. Relative luminance 0.003; OKLCH L 15.3% C 0.011 H 29.6°. Best body text is #FFFFFF at 19.64:1 contrast (WCAG AA passes).

Color values

HEX	#100A09
RGB	rgb(16, 10, 9)
HSL	hsl(9, 28%, 5%)
HSV	hsv(9, 44%, 6%)
CMYK	cmyk(0%, 37.5%, 43.8%, 93.7%)
CIE-LAB	lab(3.13, 1.71, 1.03)
CIE-LCH	lch(3.13, 1.99, 31.10°)
OKLab	oklab(15.26% 0.0095 0.0054)
OKLCH	oklch(15.26% 0.011 29.6)
XYZ	xyz(0.3715, 0.3470, 0.3058)
Luminance	0.0035 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100A09 #090F10

analogous

#10090C #100A09 #100E09

triadic

#100A09 #09100A #0A0910

tetradic

#100A09 #0C1009 #090F10 #0E0910

square

#100A09 #0C1009 #090F10 #0E0910

split-complementary

#100A09 #09100E #090C10

monochromatic

#140C0B #140C0B #140C0B #37221F #5E3B35

Accessibility & contrast

On white

19.64

#100A09 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.07

#100A09 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100A09

19.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100A09	#FFFFFF	#000000	##FFFFFF
##100A09	1.00	19.64	1.07	19.64
#FFFFFF	19.64	1.00	21.00	1.00
#000000	1.07	21.00	1.00	21.00
##FFFFFF	19.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B0B09

Deuteranopia (green-blind)

#0D0C09

Tritanopia (blue-blind)

#11090A

Achromatopsia (no color)

#0B0B0B

Design tokens & code

CSS

--color: #100a09;
/* rgb */ color: rgb(16, 10, 9);
/* oklch */ color: oklch(15.3% 0.011 29.6);

Tailwind

colors: {
  custom: {
    50: '#4e4b4b',
    500: '#100a09',
    950: '#000000',
  },
}

SCSS

$custom: #100a09;
$custom-light: #4e4b4b;
$custom-dark: #000000;

JSON

{
  "hex": "#100a09",
  "rgb": {
    "r": 16,
    "g": 10,
    "b": 9
  },
  "hsl": {
    "h": 8.571,
    "s": 28,
    "l": 4.902
  },
  "oklch": {
    "l": 0.15255,
    "c": 0.01088,
    "h": 29.6
  },
  "luminance": 0.00347
}

Semantic roles & 50–950 ramp

primary

#100A09

secondary

#2F4346

accent

#B6C463

background

#F4F4F4

surface

#E7E7E7

border

#C3C3C3

text

#010101

muted

#777777

Preview Lab

Preview with #100A09

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →